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I got curious enough to figure out the drift on a vmax 55gn doing 3100fts and it looks like maybe .25moa so 16cm at its transonic point 570m (ish)?
The coriolis to my understanding could go either...

All good points i would say except for the zeroing at 300 to offset spin drift. They do that because the max 'cone of error' of the average soldier matches the killzone on an adult chest. I I can...